Sony A77 II has a
24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz X processor. On the other hand, Sony A850 has a
25.0MP Full frame (35.9 x 24 mm ) sized CMOS sensor and features Bionz processor.
Below you can see the A77 II and A850 sensor size comparison.
As seen above, Sony A850 has a 2.4x Larger sensor area than Sony A77 II. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.
DxOMark Sensor Scores
Both Sony A77 II and Sony A850 sensors have been tested by DxoMark. DxoMark scores camera sensors for color depth (DXO Portrait), dynamic range (DXO Landscape) and low-light sensitivity (DXO Sports), and also gives them an overall score. Of the two cameras that we are comparing, A77 II has scored 82, 3 points higher than A850.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A77 II |
82 |
24.4 bits |
13.4 Evs |
1013 ISO |
Sony A850 |
79 |
23.8 bits |
12.2 Evs |
1415 ISO |